Melon, an app that simplifies the process of getting an Energy Star benchmark for a commercial building, was one of the big winners in the USgovernment’s Energy for Apps competition. The Melon app delivers an Energy Star score and suggest next stepsto improve efficiency and reduce waste, once a building managersupplies basic building information and energy use. A Washington,D.C.-based startup developed the app, which won second prize foroverall best app. The US Energy Department-sponsored Energy for Apps contest was launched this spring to challenge software developers to buildapps for mobile phones, computers and tablets based on Green Buttondata, to help…